Quantum turbulent velocity statistics and quasiclassical limit

Physics – Condensed Matter – Statistical Mechanics

Scientific paper

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4 pages, 3 figures

Scientific paper

Two research groups have measured turbulent velocity statistics in superfluid helium using different techniques. The results were in conflict: one experiment revealed Gaussian distributions(as observed in ordinary turbulence), the other experiment determined power-laws. To solve the apparent puzzle, we numerically model quantum turbulence as a tangle of vortex filaments, and conclude that there is no contradiction between the two experiments. The transition from Gaussian to power-law arises from the different length scales which are probed using the two techniques. We find that the average distance between the quantum vortices marks the separation between quantum and quasi-classical length scales.

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